Nmo promotes eye development independently of RDGN gene activation. (A, C, E, G, and I) Wild type. (B, D, F, H, and J) nmoDB24 somatic clones are marked by loss of GFP (green). (C–J) nmo loss-of-function clones have no effect on Ey (A and B), Eya (C and D), so-lacZ (E and F), Dac (G and H), or dpp-lacZ expression (I and J). Eye discs are oriented with the anterior up, dorsal left.